Between the 2009 and 2018 seasons, the Miami Marlins had the lowest winning percentage by a team, winning 45.6 percent of the time.

	TEAM	W%	W	L	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Marlins	.456	737	881	1,618	55,136	6,518	13,917	2,586	335	1,384	6,182	4,804	528	12,753	866	327	61,444	21,325	4,305	597	379	396	1,227	.252	.316	.387	.703
2	Padres	.459	744	876	1,620	54,227	6,257	12,963	2,484	319	1,416	5,922	4,905	484	13,375	1,131	380	60,559	20,333	4,219	554	389	360	1,081	.239	.306	.375	.681
3	White Sox	.463	750	870	1,620	55,192	6,806	14,011	2,557	274	1,701	6,515	4,450	644	12,212	967	447	61,000	22,219	4,532	323	391	232	1,245	.254	.315	.403	.717
4	Twins	.463	751	870	1,621	55,524	7,218	14,204	2,887	310	1,555	6,858	5,245	446	12,224	834	330	61,952	22,376	4,752	309	428	298	1,193	.256	.323	.403	.726
5	Astros	.467	756	864	1,620	54,865	6,837	13,806	2,768	241	1,673	6,476	4,762	521	12,649	1,060	417	60,952	22,075	4,682	409	395	260	1,271	.252	.315	.402	.718
6	Royals	.472	764	856	1,620	55,706	6,806	14,650	2,822	351	1,366	6,464	4,158	487	10,740	1,227	381	61,128	22,272	4,539	347	430	260	1,350	.263	.317	.400	.717
7	Orioles	.472	765	855	1,620	55,699	7,046	14,220	2,698	152	2,011	6,748	4,390	495	12,393	590	247	61,197	23,255	4,861	228	385	243	1,324	.255	.313	.418	.731
8	Rockies	.477	773	848	1,621	55,521	7,714	14,828	2,905	449	1,829	7,356	4,982	429	12,868	937	407	61,958	24,118	5,183	607	419	412	1,174	.267	.330	.434	.764
9	Mariners	.478	775	845	1,620	55,066	6,437	13,561	2,547	221	1,640	6,130	4,607	502	12,513	898	357	60,883	21,470	4,408	334	374	288	1,165	.246	.308	.390	.698
10	Mets	.480	777	843	1,620	54,963	6,708	13,645	2,780	298	1,514	6,417	5,230	540	12,293	898	335	61,682	21,563	4,592	531	418	435	1,180	.248	.317	.392	.710
11	Reds	.480	778	842	1,620	55,098	6,965	13,910	2,695	267	1,709	6,628	5,141	590	12,604	1,032	408	61,923	22,266	4,671	682	412	415	1,116	.252	.321	.404	.725
12	Diamondbacks	.480	778	842	1,620	55,448	7,175	14,055	2,916	420	1,678	6,832	5,238	453	13,304	1,013	391	62,023	22,845	5,014	478	406	439	1,138	.253	.321	.412	.733
13	Pirates	.485	785	832	1,618	54,736	6,586	13,687	2,739	331	1,446	6,301	4,899	647	12,683	901	425	61,209	21,426	4,516	548	379	384	1,200	.250	.317	.391	.708
14	Phillies	.493	799	821	1,620	55,264	6,821	13,755	2,668	332	1,617	6,505	4,889	584	12,435	933	279	61,601	21,938	4,617	504	360	403	1,118	.249	.315	.397	.712
15	Blue Jays	.495	802	818	1,620	55,287	7,499	13,937	2,918	194	2,104	7,159	5,272	500	12,128	817	299	61,746	23,555	5,216	260	427	219	1,286	.252	.321	.426	.747
16	Brewers	.503	815	806	1,621	54,875	7,134	13,967	2,727	310	1,839	6,799	5,028	631	13,021	1,162	384	61,487	22,831	4,876	580	373	356	1,224	.255	.322	.416	.738
17	Cubs	.504	816	803	1,620	55,078	6,955	13,759	2,833	300	1,684	6,613	5,245	662	13,211	691	345	61,834	22,244	4,817	489	360	410	1,169	.250	.321	.404	.724
18	Athletics	.504	817	803	1,620	55,220	7,175	13,770	2,858	272	1,661	6,822	5,304	478	12,006	905	304	61,667	22,155	4,791	221	444	217	1,232	.249	.318	.401	.719
19	Tigers	.507	821	798	1,619	55,768	7,364	14,899	2,860	338	1,682	7,056	4,971	483	11,940	666	311	61,949	23,481	4,880	302	425	371	1,355	.267	.330	.421	.751
20	Indians	.511	827	791	1,618	55,158	7,286	14,123	2,975	250	1,646	6,931	5,464	580	11,968	1,038	331	62,002	22,536	4,871	331	469	267	1,236	.256	.327	.409	.736
21	Giants	.514	832	788	1,620	55,322	6,589	14,126	2,778	382	1,274	6,236	4,650	439	11,736	784	343	61,415	21,490	4,434	536	468	412	1,259	.255	.316	.388	.704
22	Braves	.514	832	787	1,619	54,964	6,788	13,891	2,755	234	1,476	6,452	5,279	498	12,327	769	329	61,761	21,542	4,465	642	378	462	1,268	.253	.322	.392	.714
23	Nationals	.522	845	774	1,619	54,933	7,118	13,971	2,731	268	1,752	6,790	5,298	516	12,784	988	330	61,765	22,494	4,751	582	436	421	1,152	.254	.323	.409	.733
24	Angels	.523	847	773	1,620	55,134	7,313	14,197	2,727	256	1,721	6,958	4,862	551	11,449	1,034	407	61,343	22,599	4,704	342	454	327	1,294	.257	.321	.410	.731
25	Rays	.523	848	773	1,621	54,708	7,047	13,647	2,740	326	1,749	6,723	5,542	648	13,050	1,154	446	61,641	22,286	4,815	283	460	277	1,151	.249	.323	.407	.731